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authorTomasz Bursztyka <tomasz.bursztyka@linux.intel.com>2013-02-25 12:11:10 (GMT)
committerPatrik Flykt <patrik.flykt@linux.intel.com>2013-02-26 10:49:17 (GMT)
commit1d6647b0e256ec18d48ef651be258481ff7b5e2d (patch)
treeb8830d359d3d30dd5e5b51b1e884b98567646140 /plugins
parente8a408eb0014771357cba2ce7399da906784c1e7 (diff)
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neard: Add partial support for wifi provisionning via NFC
PushOOB() method implementation. Currently only basic open/psk based provisioning is supported.
Diffstat (limited to 'plugins')
-rw-r--r--plugins/neard.c273
1 files changed, 257 insertions, 16 deletions
diff --git a/plugins/neard.c b/plugins/neard.c
index 64db0df..145ab9e 100644
--- a/plugins/neard.c
+++ b/plugins/neard.c
@@ -35,6 +35,7 @@
#include <connman/plugin.h>
#include <connman/dbus.h>
#include <connman/technology.h>
+#include <connman/provision.h>
#include <gdbus.h>
@@ -47,6 +48,14 @@
#define AGENT_PATH "/net/connman/neard_handover_agent"
#define AGENT_TYPE "wifi"
+#define NEARD_SERVICE_GROUP "service_neard_provision"
+
+/* Configuration keys */
+#define SERVICE_KEY_TYPE "Type"
+#define SERVICE_KEY_SSID "SSID"
+#define SERVICE_KEY_PASSPHRASE "Passphrase"
+#define SERVICE_KEY_HIDDEN "Hidden"
+
struct data_elements {
unsigned int value;
unsigned int length;
@@ -69,6 +78,10 @@ static const struct data_elements DEs[DE_MAX] = {
#define DE_VAL_OPEN 0x0001
#define DE_VAL_PSK 0x0022
+struct wifi_sc {
+ gchar *ssid;
+ gchar *passphrase;
+};
static DBusConnection *connection = NULL;
DBusPendingCall *register_call = NULL;
@@ -137,10 +150,25 @@ static uint8_t *encode_to_tlv(const char *ssid, const char *psk, int *length)
return tlv_msg;
}
-static int parse_request_oob_params(DBusMessage *message)
+static DBusMessage *get_reply_on_error(DBusMessage *message, int error)
+{
+ if (error == ENOTSUP)
+ return g_dbus_create_error(message,
+ NEARD_ERROR_INTERFACE ".NotSupported",
+ "Operation is not supported");
+
+ return g_dbus_create_error(message,
+ NEARD_ERROR_INTERFACE ".Failed", "Invalid parameters");
+}
+
+static int parse_request_oob_params(DBusMessage *message,
+ const uint8_t **tlv_msg, int *length)
{
DBusMessageIter iter;
DBusMessageIter array;
+ DBusMessageIter dict_entry;
+ const char *key;
+ int arg_type;
dbus_message_iter_init(message, &iter);
@@ -148,10 +176,42 @@ static int parse_request_oob_params(DBusMessage *message)
return -EINVAL;
dbus_message_iter_recurse(&iter, &array);
- if (dbus_message_iter_get_arg_type(&array) != DBUS_TYPE_DICT_ENTRY)
+ arg_type = dbus_message_iter_get_arg_type(&array);
+ if (arg_type != DBUS_TYPE_DICT_ENTRY)
return -EINVAL;
- return 0;
+ if (tlv_msg == NULL && length == NULL)
+ return 0;
+
+ while (arg_type != DBUS_TYPE_INVALID) {
+ dbus_message_iter_recurse(&array, &dict_entry);
+ if (dbus_message_iter_get_arg_type(&dict_entry) !=
+ DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&dict_entry, &key);
+ if (g_strcmp0(key, "WSC") == 0) {
+ DBusMessageIter value;
+ DBusMessageIter fixed_array;
+
+ dbus_message_iter_next(&dict_entry);
+ dbus_message_iter_recurse(&dict_entry, &value);
+
+ if (dbus_message_iter_get_arg_type(&value) !=
+ DBUS_TYPE_ARRAY)
+ return -EINVAL;
+
+ dbus_message_iter_recurse(&value, &fixed_array);
+ dbus_message_iter_get_fixed_array(&fixed_array,
+ tlv_msg, length);
+ return 0;
+ }
+
+ dbus_message_iter_next(&array);
+ arg_type = dbus_message_iter_get_arg_type(&array);
+ }
+
+ return -EINVAL;
}
static DBusMessage *create_request_oob_reply(DBusMessage *message)
@@ -164,15 +224,11 @@ static DBusMessage *create_request_oob_reply(DBusMessage *message)
int length;
if (connman_technology_get_wifi_tethering(&ssid, &psk) == FALSE)
- return g_dbus_create_error(message,
- NEARD_ERROR_INTERFACE ".NotSupported",
- "Operation is not supported");
+ return get_reply_on_error(message, ENOTSUP);
tlv_msg = encode_to_tlv(ssid, psk, &length);
if (tlv_msg == NULL)
- return g_dbus_create_error(message,
- NEARD_ERROR_INTERFACE ".NotSupported",
- "Operation is not supported");
+ return get_reply_on_error(message, ENOTSUP);
reply = dbus_message_new_method_return(message);
if (reply == NULL)
@@ -198,22 +254,207 @@ static DBusMessage *request_oob_method(DBusConnection *dbus_conn,
{
DBG("");
- if (parse_request_oob_params(message) != 0)
- return g_dbus_create_error(message,
- NEARD_ERROR_INTERFACE ".Failed",
- "Invalid parameters");
+ if (parse_request_oob_params(message, NULL, NULL) != 0)
+ return get_reply_on_error(message, EINVAL);
return create_request_oob_reply(message);
}
+static void free_wifi_sc(struct wifi_sc *wsc)
+{
+ if (wsc == NULL)
+ return;
+
+ g_free(wsc->ssid);
+ g_free(wsc->passphrase);
+
+ g_free(wsc);
+}
+
+static inline int get_2b_from_tlv(const uint8_t *tlv_msg, uint16_t *val)
+{
+ *val = ntohs(tlv_msg[0] | (tlv_msg[1] << 8));
+
+ return 2;
+}
+
+static uint8_t *get_byte_array_from_tlv(const uint8_t *tlv_msg, int length)
+{
+ uint8_t *array;
+
+ array = g_try_malloc0(sizeof(uint8_t) * length);
+ if (array == NULL)
+ return NULL;
+
+ memcpy((void *)array, (void *)tlv_msg, length*sizeof(uint8_t));
+
+ return array;
+}
+
+static char *get_string_from_tlv(const uint8_t *tlv_msg, int length)
+{
+ char *str;
+
+ str = g_try_malloc0((sizeof(char) * length) + 1);
+ if (str == NULL)
+ return NULL;
+
+ memcpy((void *)str, (void *)tlv_msg, length*sizeof(char));
+
+ return str;
+}
+
+static inline DEid get_de_id(uint16_t attr)
+{
+ int i;
+
+ for (i = 0; i < DE_MAX && DEs[i].value != 0; i++) {
+ if (attr == DEs[i].value)
+ return i;
+ }
+
+ return DE_MAX;
+}
+
+static inline gboolean is_de_length_fine(DEid id, uint16_t length)
+{
+ if (DEs[id].fixed_length == TRUE)
+ return (length == DEs[id].length);
+
+ return (length <= DEs[id].length);
+}
+
+static char *get_hexstr_from_byte_array(const uint8_t *bt, int length)
+{
+ char *hex_str;
+ int i, j;
+
+ hex_str = g_try_malloc0(((length*2)+1) * sizeof(char));
+ if (hex_str == NULL)
+ return NULL;
+
+ for (i = 0, j = 0; i < length; i++, j += 2)
+ snprintf(hex_str+j, 3, "%02x", bt[i]);
+
+ return hex_str;
+}
+
+static struct wifi_sc *decode_from_tlv(const uint8_t *tlv_msg, int length)
+{
+ struct wifi_sc *wsc;
+ uint16_t attr, len;
+ uint8_t *bt;
+ int pos;
+ DEid id;
+
+ if (tlv_msg == NULL || length == 0)
+ return NULL;
+
+ wsc = g_try_malloc0(sizeof(struct wifi_sc));
+ if (wsc == NULL)
+ return NULL;
+
+ pos = 0;
+ while (pos < length) {
+ pos += get_2b_from_tlv(tlv_msg+pos, &attr);
+ pos += get_2b_from_tlv(tlv_msg+pos, &len);
+
+ if (len > length - pos)
+ goto error;
+
+ id = get_de_id(attr);
+ if (id == DE_MAX) {
+ pos += len;
+ continue;
+ }
+
+ if (is_de_length_fine(id, len) == FALSE)
+ goto error;
+
+ switch (id) {
+ case DE_AUTHENTICATION_TYPE:
+ break;
+ case DE_NETWORK_KEY:
+ wsc->passphrase = get_string_from_tlv(tlv_msg+pos,
+ len);
+ break;
+ case DE_SSID:
+ bt = get_byte_array_from_tlv(tlv_msg+pos, len);
+ wsc->ssid = get_hexstr_from_byte_array(bt, len);
+ g_free(bt);
+
+ break;
+ case DE_MAX:
+ /* Falling back. Should never happen though. */
+ default:
+ break;
+ }
+
+ pos += len;
+ }
+
+ return wsc;
+
+error:
+ free_wifi_sc(wsc);
+ return NULL;
+}
+
+static int handle_wcs_data(const uint8_t *tlv_msg, int length)
+{
+ struct wifi_sc *wsc = NULL;
+ GKeyFile *keyfile = NULL;
+ int ret = -EINVAL;
+
+ wsc = decode_from_tlv(tlv_msg, length);
+ if (wsc == NULL)
+ return -EINVAL;
+
+ if (wsc->ssid == NULL)
+ goto out;
+
+ keyfile = g_key_file_new();
+ if (keyfile == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ g_key_file_set_string(keyfile, NEARD_SERVICE_GROUP,
+ SERVICE_KEY_TYPE, "wifi");
+ g_key_file_set_string(keyfile, NEARD_SERVICE_GROUP,
+ SERVICE_KEY_SSID, wsc->ssid);
+ g_key_file_set_boolean(keyfile, NEARD_SERVICE_GROUP,
+ SERVICE_KEY_HIDDEN, TRUE);
+
+ if (wsc->passphrase != NULL)
+ g_key_file_set_string(keyfile, NEARD_SERVICE_GROUP,
+ SERVICE_KEY_PASSPHRASE, wsc->passphrase);
+
+ ret = connman_config_provision_mutable_service(keyfile);
+
+out:
+ g_key_file_free(keyfile);
+ free_wifi_sc(wsc);
+ return ret;
+}
+
static DBusMessage *push_oob_method(DBusConnection *dbus_conn,
DBusMessage *message, void *user_data)
{
+ const uint8_t *tlv_msg;
+ int err = EINVAL;
+ int length;
+
DBG("");
- return g_dbus_create_error(message,
- NEARD_ERROR_INTERFACE ".NotSupported",
- "Operation is not supported");
+ if (parse_request_oob_params(message, &tlv_msg, &length) != 0)
+ return get_reply_on_error(message, err);
+
+ err = handle_wcs_data(tlv_msg, length);
+ if (err != 0)
+ return get_reply_on_error(message, err);
+
+ return g_dbus_create_reply(message, DBUS_TYPE_INVALID);
}
static DBusMessage *release_method(DBusConnection *dbus_conn,